/**
 * Copyright (c) 2009 Jim Hurne
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */
package org.tzconverter.opacity.level;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

/**
 * Manager for the Translucent Level Dialog triad.
 *
 * @author Jim Hurne
 * @since Jun 25, 2009
 */
public class OpacityLevelManager
{
  private final OpacityLevelModel model;
  private final OpacityLevelView view;

  /**
   * @param model
   * @param view
   */
  public OpacityLevelManager(OpacityLevelModel model,
      OpacityLevelView view)
  {
    this.model = model;
    this.view = view;

    registerListeners();
  }

  private void whenOkButtonClicked()
  {
    model.setOpacityLevel(view.getSliderValue() / 100f);
    view.setVisible(false);
  }

  private void whenCancelButtonClicked()
  {
    // Reset the opacity level back to the original value.
    view.setOpacityLevel(model.getOpacityLevel());
    view.setVisible(false);
  }

  private void whenSliderLevelChanged(int newLevel)
  {
    view.setOpacityLevel(newLevel / 100f);
  }

  private void whenVisibilityChanged(boolean isVisible)
  {
    if(isVisible)
    {
      //Initialize the view's opacity level.
      view.setSliderValue((int) (model.getOpacityLevel() * 100));
      view.setOpacityLevel(model.getOpacityLevel());
    }
  }

  private void registerListeners()
  {
    view.addOkButtonActionListener(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e)
      {
        whenOkButtonClicked();
      }
    });

    view.addCancelButtonActionListener(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e)
      {
        whenCancelButtonClicked();
      }
    });

    view.addPropertyChangeListener(new PropertyChangeListener() {
      @Override
      public void propertyChange(PropertyChangeEvent event)
      {
        if(OpacityLevelView.PROP_SLIDER_LEVEL.equals(event.getPropertyName()))
        {
          whenSliderLevelChanged((Integer) event.getNewValue());
        }
        if(OpacityLevelView.PROP_VISIBLE.equals(event.getPropertyName()))
        {
          whenVisibilityChanged((Boolean) event.getNewValue());
        }
      }
    });
  }
}
